1991 Jeep Wrangler
Crutchfield Customer Review (What's this?)
Pros: Easy install
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You like to go your own way. You zig when others zag. So clearly the standard red or blue illumination display for your car stereo won't do. JVC's KD-R640 CD receiver offers the choice of over 30,000 different colors for the display and controls on this receiver. You can assign different colors to the display and controls, and even set the receiver to cycle through all colors for constant variety.
Use the easily accessible front-panel USB port for your iPod, iPhone, or Android phone, then use this JVC's driver-friendly controls to access and enjoy your playlists. Or load a thumb drive up with your favorite tunes and rock out that way. And if you're a CD fan, you've got the option to drop in a disc, too. The KD-R640 includes a front auxiliary input for a Dock-and-Play satellite radio or other sound source.
You can make fine adjustments to the highs, mids, and lows with the 3-band parametric EQ, and you can use the built-in high-pass filter to trim the low bass from your speakers, allowing them to run at peak efficiency. You'll find two sets of preamp outputs for connecting amps and subs, and you can even switch the rear preamp outputs to subwoofer mode, then use the subwoofer level control for on-the-fly changes.
You can zero in on an exact match for your car's dash lighting, or just go wild.
It's never wise to handle your phone while driving. Experience the safety and convenience of hands-free calling by adding JVC's Bluetooth® adapter. When a call comes in, you'll talk naturally and hear your caller over your speakers – just like you're talking to someone in the front seat. You can keep both hands free and concentrate on your driving. The adapter also gives you the ability to stream music from a compatible device straight into the JVC.iPod note: If you're going to use your iPod with this receiver, be sure to check "Details" for specific iPod model compatibility with this receiver or its optional iPod adapter.
Anonymous, Rhode island
Average Customer Review(s):
Pros: Easy install
I got this unit and was able to install it in my 06 jeep liberty very easily with the kit this site supplied, took perhaps 20 minutes and all the features supplied in my sports model jeep wired into the stereo Sound is decent for the price, I will be getting better matched speakers for it soon, stock in my car are 2 ohms My favorite feature of this stereo is the dim-able buttons and LCD display, that both can be changed to many colors, independently. Was able to set up the stereo to have the same brightness level and colors at night as the factory dash lights.
Pros: Good dimming so the stereo is not distracting at night, good features for the price
Cons: Pandora mode takes all interface from the pandora app in an iPhone, my old jvc deck still allowed me to use pandora's interface on the phone.
This was a christmas present for my son which really was important that he would like. I used what is important to him in a system and I nailed it with JVC. Crutchfield was great including everything I would need for the install and we had to call technical and they where quick and right the first time!!!!
Pros: Coolness factor, great sound, great cost, great opotions
Very nice, easy to install and easy to operate. Great service from your team
Got this for my daughter as a Christmas gift. Couldn't be more pleased with this radio. Very easy to install and the radio not only sounds fantastic but looks great to.
Pros: Ease of installation and user friendly
Beautiful Stereo for the money. We love it!
I installed this in my 1998 Grand Prix GTP (with 8 speakers, no OnStar), it sound absolutely stunning even with the factory speakers (yes they still work). The wiring is easy as could be, but the mounting kit that was included forced me to grind down parts of the dashboard (you can't see it) and the radio sticks out about an inch now.
Pros: Great quality, easy install, says name of playing song (on radio-with the antenna), very loud, powerful bass
Cons: Nothing, this thing is stunning for the price.
Awesome radio for the money!
The deck is pretty cool looking, easy to use, easy to install. The only real complaint I have is that the sound quality really is not that great. I replaced a stock stereo from my 2001 Volvo s60. Sound quality dropped a ton. Which made me sad. :( I never had any complaints about the sound quality of my stock system, ,it just began acting up so I decided to replace with this JVC. I could only take it for a few days before I re-installed the stock stereo system . I noticed that a few other people have put 4 stars for the sound quality of this unit and not 5. I would pay attention to that. There ARE better sounding units in the same price range. i suggest going with something else for better sound. I may try Alpine next. Thank you however Crutchfield for working with me. I will be purchasing my next deck through you.
Pros: awesome looking, great features/expandable.
Cons: Lacking in the sound quality department. Yes, even for the price range.
Got this for my daughter and it is fantastic. She loves it and it was incredibly easy to install.
Pros: Easy to install, clear instructions, great packaging, daughter loves it.
Cons: None that I have found!
This radio has lousy FM and non-existent AM reception*. The buttons surrounding the main dial are placed too close to the dial for use during driving. The daytime brightness level is insufficient. The CD mechanism seems to be a bit "Jumpy." Maybe after a few more weeks, I'll get used to all that, but for now....not my favorite radio. I am thinking I may have to return it. * Maybe it's my car? Maybe it's the Nissan antenna adapter? Who knows. This is the end result, to me, the end user.
Pros: Good, clear sound Lots of control and display options
Cons: Buttons are too small. FM reception weak AM reception non-existent Bouncy/Jumpy CD player Won't work with my Android phone at all (but I sort of expected that)
Fantastic Quality easy to install looks great and Sounds Awesome
Cons: Not a one
If you don't own one your not getting the quality you should be getting. Sorry about your luck, should have got the best . JVC all the way
Pros: everything you could ever ask in a stereo. always been a big fan of JVC
Cons: Not owning one
Great head unit for the money. Pretty easy to setup and install.
Pros: Sounds good, plenty of options, nice usb connection on face. Lots of cool colors if your into that....
Cons: Only 2 sets of rca hookups on back of unit.
The radio does everything I wanted, sounds much better than the OEM radio, installation was easy and it looks cool.
Pros: Wish I knew about this five years ago. The radio does everything I was looking for, sounds much better than the OEM radio, installation was easy, Crutchfield was very helpful and the radio looks cool.
Cons: My only complaint is that the radio display does not get bright enough to read the time during the day.
A great sound system ,that sounds better than I expected and with the instructions and install kit was a breeze to install. Crutchfields sales people made this purchase a easy choice. Will use this company and products again . So pull out that cheap stock sound system and do yourself a favor.
Pros: Great sound ,fits like it was made just for this truck and easy install
Cons: I waited to long to purchase this system
JVC makes a great car radio ..good reception lots of options...great price..ease installation...my second JVC for my other car...
Pros: Easy LED and operation...price is right...
Great product , great price , easy to install .
Solid performance and features at a budget price
Pros: easy setup
JVC/Kenwood corporation make the best head units on the market today. Whether you are using an amp or not these have the best output wattage available. The quality and features are outstanding!!!!
Front USB and Ipod controls, Able to change the color to match your mood or console lights. Great Sound even with factory speakers. Everything i wanted at a good price. The demo button (which i don't see a need for this) is right with all the controls, i've hit it more than once when using the radio.
Pros: Great sound, front usb and IPOD control
Cons: Demo button - i keep hitting this
I hooked everything up myself and it was pretty simply, had no problem. It's easy to work when it's installed and haven't had any problems.
Pros: Color adjusts, fits well, easy controls, USB and aux capable
Cons: Can't get the correct blue, volume knob seems a little cheap
Pros: just what i wanted
Works very well for what I need. I didn't need a large display screen or Bluetooth, so this was right up my alley for an affordable price.
Pros: Adjustable colored lights for display and buttons, adjustable brightness, easy to use, very customizable altogether.
Cons: Honestly can't think of anything.
Ok, unit is cool, good sound, the colors are neat, I like the file reading from usb, don't need an mp3 player. But the layout could be better. Skip buttons to small for a big hands, set up took some time and some reading. File reading could be smarter, very hard to find a certain song, artist or album.
Pros: Cool unit Good sound Colors are neat File reading from usb
Cons: Skip buttons to small for a big hands Set up took some time and some reading File reading could be smarter, very hard to find a certain song, artist or album.
I got this for my girlfriends car not only does she love it, I want it, lol. I have two Sony Xplode speaker in the front and stock speakers in the back and yet this receiver makes it sound and feel like all my speakers are aftermarket. The subwoofer feature is perfect as well it make my rear speakers into hard bumping subwoofers, no distortion. This system even fixed my radio station problem of only getting certain local stations to getting them all and more with no interference. The dimmer feature is great too as soon as the headlights go on the stereo changes to night time color. The only complaint I have is that it isn't very easy to take the face of the stereo off. Other than that even the in dash receiver kit is perfect too it makes the stereo look like it was made for my car no gaps, like stock stereo. One last thing, I don't even know how high the receiver goes because it is loud enough at volume 25.
Pros: Everything from color changing ability to speaker quality change.
Cons: Difficult to take face plate off.
Great sound and cool looks but I am disappointed with the fm reception.
Pros: Sounds great for cd's and aux inputs. Color selections.
Cons: FM reception is bad in my subaru.
Ordered the JVC receiver after reading most of the positive reviews and they were right. After getting this baby installed and discarding my factory unit the sounds coming out of this exceeded my expectations. The USB port for my IPod charges at the same time that my music is playing. The multicolor screen has a factory setting to change colors in the display every 5 seconds which looks pretty cool at night. It also has various sound settings to equalize your music that I haven't begun to play with as of yet. Just happy to have found a decent prices receiver that with the help of instruction I could do without the help of an installer. I AM THE INSTALLER!
Pros: Polished black faceplate and bezel. Multicolor displays. Great output of audio signals coming off a head unit.
Was easy to install. I like that the radio integrates with satellite radio. The color choices are incredible
Pros: Ease of use
Cons: None at this time
I installed this radio in my John Deere tractor needed an upgrade from the 70s'. Had to modify the original casing for the new radio. After that everything installed easy. Thanks Crutchfield!
Great sound even with factory speakers. Nice stereo for the money
Pros: don't have to mess with factory lock codes
I purchased this to replace another JVC that was in my BMW. The upgrade is definitely worth it - reception, sound quality and overall appearance all improved, and like any great company, JVC included all the right owners manuals on PAPER making it easy to install and easy to program. iPod control is easy and there are lots of input options - overall a great product.
Pros: Radio reception, sound quality, LED 2 zone lighting, USB port and iPod control, great operating instructions
Cons: none noticed.
Works great with my speakers, pushes very well without distortion, clear sound all around. Picks up radio stations 2x better than my stock.
Pros: Quick install, better reception, plenty of options to make it yours.
Cons: Remote is too small and when choosing options, it stays up too long(menu option do not go away fast, tend to change it on accident too often)
Overall great head unit. Very pleased and does all that I need. Lots of colors, USB and aux hookups.
Pros: USB and aux. color options. Dimmer
Cons: Seems to reset every time I start the truck so I have to reprogram everything; clock, EQ, colors, etc.
Wanted to add iphone plug in to my truck. This unit solved all my problems. Very easy install. Sound and quality meet all of my expectations. I am impressed with how easy I could learn all the features. Very good value for the cost.
Pros: Great value for the cost.
Cons: None found
Just what my girlfriend wanted!!!
Pros: Easy installation
Cons: None so far!
This replaced my factory in dash 6 dish changer stereo. Night and day difference in sound quality. Color change is nice to match factory backlighting. FM reciever pulls in stations much better than stock. Easy to use. Plenty of features for a lower priced unit. Install kit worked great.
Pros: Sound quality, features for price.
Cons: Really splitting hairs here, but volume knob is smooth/slick. Wish it was textured or had a rubber grip.
Great radio for price never thought I could get this much sound out of my factory speakers and Pandora is a awesome factor as well just plug in and it takes care of the rest. Crutchfield has everything covered from showing finishing plates to quick connection wires just select car through website and they will show you everything you need to do the job.
Pros: Great price
Cons: Takes some time to learn all features.
Great product for its cost,". Easy to install and works well with iPhone and android device. Just make sure you have an auxiliary cable for the android device.
Pros: Cost, installation, display, and sound
Cons: None so far
as usual, jvc never disappoints. and as usual, crutchfield is top of the crop for customer service, price, and shipping. this deck is great. hooked up in 10 mins, and mostly figured out in 20 mins just by playing around with it. im sure ive only seen 1/4 of its potential, and im already happy. great buy. only gripe is the buttons are a little different, takes a while to get used to how u push them, ull see what i mean if u buy it.
Pros: price, shipping, features
Cons: buttons are diffrent than most
From opening the box to the first time the radio lit up I was impressed greatly. This component runs Pandora, Sirius/XM, CD/CDR-W (etc), aux, USB...too much!!! This made our stock speakers sound 10x better (is it me or the stereo). Easy to install with step by step directions. The colors are amazing, can't believe the Sirius/XM is controlled from the radio...yeah baby!
Pros: Easy to install, sounds beyond amazing, all the bells and whistles live true to the JVC name.
Cons: That I don't have one in my truck...this one is in my wifes car.
Works as advertised. Looks and sounds pretty good for a 100 dollar receiver. The choice of colors is varied and a nice touch. Iphone/ipod interface including pandora works well and is pretty intuitive. Don't expect any crazy graphical displays, but is a solid and inexpensive head unit.
Pros: color choices, usb/aux input, intuitive interface beyond initial setup
Cons: none so far
|Memory Card Slot||USB memory|
|Satellite Radio Ready||SiriusXM|
|RMS Power Output||20 watts|
|Peak Output||50 watts|
|RMS Power Bandwidth||20-20kHz|
|Sub Preamp Outputs||No|
|Switchable Rear Preamp Outputs||Yes|
|Preamp Voltage||2.5 volts|
|Key Button Color||Variable|
|Steering Wheel Control Compatible||No|
|Parts Warranty||1 Year|
|Labor Warranty||1 Year|
|FM Sensitivity||9.3 dBf|
|Radio Data System||No|
Disc Compatibility: The unit features a single disc player that will playback CD-Audio, CD-Text, and finalized CD-R/CD-RW audio discs. The unit also supports playback of MP3/WMA music files loaded onto CD-R/RW discs.
Front-Panel USB Port: The JVC KD-R640 features a front-panel USB 2.0 type-A port (behind a sliding cover) connection and control of a portable USB mass-storage class (MSC) device; such as select Android smartphones (Froyo/Gingerbread OS only), portable digital audio players, or USB thumbdrives. The USB port enables audio playback and control of MP3, WMA, & WAV audio files stored on portable USB mass-storage class devices. USB portable audio devices that can be charged via USB will be charged when plugged into the CD receiver's USB port (5V/1A), and the vehicle's ignition switch is set to ACC or On. You cannot connect a USB device via a USB hub or Multi-Card Reader to this unit.
MP3/WMA Playback: The JVC KD-R640 supports the following types of MP3, WMA, WAV files recorded onto CD-R/RW disc or loaded onto a USB mass storage class device.
|Media Type||CD-R/RW||USB Storage Device|
|File System||ISO9660 Level 1 or 2, Romeo, Joliet, or Windows long file name||FAT 12/16/32|
|Playable File Types|
MP3: bit rate of
8-320kbps w/ sampling rate of 8, 11.025, 12, 16, 22.05, 24, 32, 44.1,
|Maximum # of Folders/Files||255 folders/65,025 files (255 files per folder)|
|Tags||ID3 tag (version 1.0/1.1/2.2/2.3/2.4), WMA tag|
Track/Folder List: The Track/Folder List displays a list of MP3/WMA folders and tracks on a loaded CD or USB device, so you can easily access your music. The Track/Folder List will also display the list of track titles on a CD Text disc.
Quick Search: You can search for your MP3 or WMA music tracks alphabetically (A-Z) or numerically (0-9).
Random/Repeat Modes: The JVC KD-R640 offers the following Repeat and Random playback modes.
Resume: If you change the source, playback also stops (without ejecting the disc or USB device). Next time you select CD or USB for the playback source, the player will start from where it has been stopped previously.
JVC Playlist Creator Compatible:JVC Playlist Creator is a free Windows-based desktop software that helps organize, manage and transfer MP3/WMA music files to your USB (MSC) device from your PC. When you playback audio files that have been stored on your USB (MSC) device using JVC Playlist Creator through the KD-R640, you can search a file by song title, album name, artist name, or genre using the head unit's Quick Search function. The JVC Playlist Creator is a Windows-based software that can be downloaded for free from JVC's website to your PC. The JVC Playlist Creator is compatible with the following Windows Microsoft Operating Systems.
Note: Not compatible with Apple iPod/iPhone/iPad, Zune, or Android
Off Insert/Eject: A CD disc can be inserted or ejected with the power off. When a disc is inserted with the power off, the unit will automatically power up and begin playback.
Disc Protection:If the ejected disc is not removed within 15 seconds, the disc is automatically inserted again into the loading slot to protect it from dust. The source will change to CD, and the disc will begin playback, even if you have another source selected at the time.
Mounting: For proper disc playback you must install the unit within 30-degrees of horizontal.
iPod/iPhone Direct: The JVC KD-R640's front-panel USB port can acts as an iPod/iPhone high-speed direct connection when used with the USB/iPod cable that came with your iPod/iPhone. The USB connections allows audio playback, music navigation, information display, and charging of select iPod/iPhone models from the JVC in-dash head unit. The head unit supports audio playback from music stored on your iPod/iPhone or music apps (such as iHeartRadio, SiriusXM, Last.fm, Rhapsody, & Slacker) streamed to your iPhone (not all music apps will be compatible).
iPod Compatibility Chart: The JVC KD-R640 is "Made for iPod/iPhone" compatible and supports the following iPod/iPhone model features (as of 9/19/2013):
|Apple Device||Generation||Tested Version||Media Type||Control Type||Display Type||Charge|
|Audio||Video||Head Unit||iPod/iPhone||External mode||Pandora app||Artist/Song Text||Track Info|
Note: Apple iPod/iPhone software updates may change functionality results. If you download a newer software version, you may need to reset the head unit and your iPod/iPhone to regain functionality. If this doesn't work, you may need to wait until a newer software update is available.
JVC Music Control (for Android): By connecting the JVC CD receiver via USB to an Android smartphone (OS 2.2+) that has the free JVC Music Control app installed, it allows you to list and search all of the songs stored inside the smartphone from the receiver by artist name or album name. The JVC Smart Music Control app also analyzes all of your songs that are in your Android smartphone, and creates a playlist according to your mood. Once the application has completed the analysis of the songs, simply move the on-screen "mood ball" to your current mood, and this application will generate a list of songs that most fits your mood. Your compatible Android smartphone must be recognized as a USB mass storage class device; not compatible with MTP protocol.
Front-Panel Auxiliary Input: A front-panel stereo minijack is provided to allow the connection of almost any portable audio source with a 3.5mm headphone output (great for those non-Apple/Android devices. Simply connect your portable digital music player to the unit's front-panel auxiliary input, and you can listen to the audio from the portable player through the speakers in your mobile audio system. The unit's front-panel auxiliary input can be turned On or Off.
RDS AM/FM Tuner: The JVC KD-R640 features a built-in RDS AM/FM tuner with manual, seek, and preset tuning. The Radio Data System (RDS) feature displays radio broadcast information such as artist, title, and album when listening to compatible AM/FM stations. You can store a total of 18 FM stations presets and 6 AM station presets (manually or automatically). The head unit's Radio Timer features lets you tune into a preset station at a specific time regardless of the head unit's current source (you can activate the Radio Timer once, daily, or turn it completely off). If an analog FM stereo broadcast is hard to receive, you can manually switch the tuner to Mono operation. You can also switch the tuner's IF filter to Wide or Auto to increase/decrease the sensitivity.
Note: You can set the built-in AM/FM tuner between US standard and European tuning spacing.
Pandora Internet Radio: Pandora is the leading Internet Radio music service in the United States, giving people music they love anytime, anywhere, through personalized radio stations. The JVC KD-R640 provides complete access to your Pandora account using your iPhone, via the head unit's front-panel USB port. To access Pandora you must have an Apple iPhone (iOS5 or later) with the latest version of the Pandora App from Apple's iTunes App Store. Your iPhone will need an active Data Plan account with connection to the Internet via 3G, EDGE, or WiFi. In addition, you will need an active Pandora music service account. The JVC KD-R640 will display Artist, Album, & Song information provided by the Pandora app on your iPhone. The JVC KD-R640 will also provide control over the Pandora music service streamed to your USB-connected iPhone.
Note: Access to the Pandora service will depend on the availability of a cellular and/or WiFi network for purposes of allowing your iPhone or smartphone to connect to the Internet. Pandora is not supported in Canada and only available in the United States.
SiriusXM Ready: The JVC KD-R640 comes ready for SiriusXM programming with access to XM and Sirius Satellite Radio stations. Thanks to its proprietary SiriusXM Connect port, you can add the optional SXV200V1 SiriusXM Connect tuner and receive more than 150 channels of exclusive programming directly from SiriusXM, via the "SiriusXM All Access" package (subscription required). VisitSiriusXM.com for a complete list of subscription options and channel guide. Additional features of the SXV200 SiriusXM Connect tuner include:
Note: A separate SiriusXM Satellite Radio subscription is required (operates on the XM Network). However, you can easily add this SiriusXM tuner to an existing Sirius or XM account for a Multi-Radio Discount Plan.
24 Bit D/A Converter: The JVC KD-R640 utilizes a 24-bit digital to analog converter for superior sound quality.
MOSFET Amplifier: The KD-R640 is equipped with a MOSFET amplifier. Compared to conventional power supplies, the MOSFET amplification circuit is smaller and more efficient, and it delivers increased power with less distortion and absolutely zero on/off switching noise. More power means louder and cleaner music at higher volumes because you're not pushing the limits of the amplification circuit.
CEA2006 Compliant: The power specifications for the KD-R640 are compliant with the CEA2006 Mobile Amplifier Power Testing and Measurement standards from the Consumer Electronics Association (CEA). These standards were developed as a way to equitably compare power specs from model to model and between manufacturers. The power output specs for the KD-R640 are as follows:
Amplifier Gain Control: When you are using the KD-R640 with factory speakers (or those rated to less than 50 watts peak), the Amplifier Gain Control can limit the amount of power being sent to those speakers. When the Amp Gain Control is set to "low," the volume control ranges from 0 (minimum) to 30 (maximum). When using speakers rated higher than 50 watts peak, you can set the Amp Gain Control to "high," and the volume control will range from 0 to 50.
2.5V/4CH Preamp Output: The KD-R640 is equipped with two pair of 2.5V preamp outputs (Front, Rear/SW). You can set the Rear/SW preamp outputs for connecting a pair of full-range rear speakers (through an external amplifier) or for connecting a subwoofer (through an external amplifier). When set for rear speakers, the rear outputs operate with the unit's fader control. When set for subwoofer, the outputs are non-fading.
Subwoofer Controls: When the unit's Rear/SW preamp output is set to Subwoofer, you can set the cutoff frequency of the low-pass filter at 55Hz, 85Hz, or 120Hz. You can adjust the head unit's subwoofer level between -8 and +8 (separate from the main volume level).
Pro EQ: The KD-R640 is equipped with JVC's Pro EQ. The integrated equalizer offers 7 preset sound modes (Flat, Natural, Dynamic, Vocal Boost, Bass Boost, & User) suitable for the music genre of your choice. The User mode allows you to manually adjust the head unit's 3-band parametric EQ (Frequency, Level, and Q-Factor).
|Bass||60, 80, 100, 200 Hz||+/- 12 dB (-6 to +6)||1.0, 1.25, 1.5, 2.0|
|Midrange||0.5, 1.0, 1.5, 2.5 kHz||+/- 12 dB (-6 to +6)||0.75, 1.0, 1.25|
|Treble||10.0, 12.5, 15.0, 17.5 kHz||+/- 12 dB (-6 to +6)||Fixed|
Note: You can store Pro EQ bass, middle and treble tone settings for each source (CD, AM/FM, Aux, USB, iPod, Bluetooth, and Pandora).
Bass Boost: The unit's Bass Boost enhances low bass frequencies.
Loud (Loudness): This feature boosts low and high frequencies to produce a well-balanced sound at a low volume level. You can set this feature to High, Low, or Off.
Volume Adjust: The input level of each source (other than FM) is adjustable relative to the FM radio volume, so there isn't a significant volume difference when changing sources. Each source is individually adjustable from -5 to +5.
Key Beep: The in-dash head unit provides an audible beep to confirm button operation. This function can be turned On or Off.
Detachable Face: The JVC KD-R640 features a detachable face to deter theft. No face-case is provided. An optional soft face case (142DFC1X, sold separately) can be purchased for this unit. A face-fixing screw is supplied for making the face non-detachable, if desired.
Variable Color LCD & Key Illumination: The JVC KD-R640 features 29 color presets for the LCD and button illumination. You can choose one of these color presets or select the ColorFlow mode which scrolls through all 29 color presets. Additionally, there is a User preset, allowing you to individually adjust the intensity of Red, Green, and Blue from 0 to 31; resulting in approximately 30,000 custom color options. The chosen color preset or custom color can be applied to the display panel and the backlighting for all the buttons except the eject button (it remains red). You can choose to use the same color for the LCD display and button illumination, or use a separate color for each one. You can also select a different color for daytime and nighttime in regards to the unit's LCD and button illumination.
Brightness: The unit offers an adjustable display and button
illumination brightness level (0-31) for day and nighttime driving.
Display/Button Illumination Dimmer: The display/button illumination dimmer can be set to Off (normal brightness at all times), On (display/button illumination is always dimmed), or Auto (display dims when 12-volts is applied to the orange/white illumination lead).
Wireless Remote Control: The KD-R640 comes supplied with a wireless remote control (RM-RK52). The remote contains Attenuator, Sound, Source, Tracking, and Volume functions. The remote operates off of a single CR2025 3V Lithium-cell battery (included).
Optional Bluetooth: The JVC KS-BTA100 Bluetooth Adapter (105KSTBA10, sold separately) provides Bluetooth hands-free communication and digital audio streaming functions for the JVC KD-R640. The JVC KS-BTA100 gives you hands-free communication from your compatible Bluetooth mobile phone and wireless streaming audio from a Bluetooth enabled digital audio player, when connected to the JVC in-dash head unit. The JVC Bluetooth Adapter includes a super-sensitive microphone, an Answer/End button, and playback controls. The JVC KD-R640 can be set to automatically mute any music audio to your vehicle's speakers so you can listen to your telephone call using your car speakers.
Note: Not all Bluetooth devices will be compatible. Visit the JVC Mobile Entertainment Bluetooth Support Page for a complete list of compatible Bluetooth enabled devices.
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